Cita APA (7a ed.)
World Book, Inc. (1981). Medical update: The World Book family health annual. World Book-Childcraft International.
Cita Chicago Style (17a ed.)
World Book, Inc. Medical Update: The World Book Family Health Annual. Chicago: World Book-Childcraft International, 1981.
Cita MLA (9a ed.)
World Book, Inc. Medical Update: The World Book Family Health Annual. World Book-Childcraft International, 1981.
Precaución: Estas citas no son 100% exactas.